无法访问SwiftUI TextField inside堆栈锁定

import SwiftUI

struct ContentView: View {
    @State private var text = ""

    var body: some View {
        VStack {
            TextField("Enter text", text: $text)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
        }
        .onAppear {
            DispatchQueue.main.async {
                // 确保在主线程上更新 UI
                self.text = "Initial text"
            }
        }
    }
}

struct ContentView: View {
    @State private var text = ""

    var body: some View {
        ZStack {
            VStack {
                TextField("Enter text", text: $text)
                    .padding()
                    .background(Color.gray.opacity(0.2))
                    .cornerRadius(8)
            }
            // 确保没有其他视图覆盖 TextField
            Button(action: {
                print("Button tapped")
            }) {
                Text("Submit")
                    .foregroundColor(.white)
                    .padding()
                    .background(Color.blue)
                    .cornerRadius(8)
                    .frame(maxWidth: .infinity, alignment: .bottom)
            }
        }
    }
}

struct ContentView: View {
    @State private var text = ""

    var body: some View {
        VStack {
            TextField("Enter text", text: $text)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
            Text("You entered: \(text)")
                .padding()
        }
        .onAppear {
            // 确保状态变量在需要时正确更新
            self.text = "Initial text"
        }
    }
}